Is CVE-2022-21504 being actively exploited?

CVE-2022-21504 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2022-21504?

CVE-2022-21504 has a CVSS 3.1 base score of 5.5 (MEDIUM).

CVE-2022-21504

MEDIUM · CVSS 5.5EPSS 0.3%EU EUVD

The code in UEK6 U3 was missing an appropiate file descriptor count to be missing. This resulted in a use count error that allowed a file descriptor to a socket to be closed and freed while it was still in use by another portion of the kernel. An attack with local access can operate on the socket, and cause a denial of service. CVSS 3.1 Base Score 5.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Key facts

CVSS score: 5.5 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-416
EPSS score: 0.3% (16th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2022-26728)
Published: June 14, 2022
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2022-26728 in the EU Vulnerability Database. Last updated in EUVD on September 24, 2024.

View on the EU Vulnerability Database

Affected products

oracle / linux
oracle / linux

Certified products that may be affected

26 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Oracle Linux 8 Unbreakable Enterprise Kernel (UEK7) Cryptographic Module and Oracle Linux 9 Unbreakable Enterprise Kernel (UEK7) Cryptographic Module - Oracle Corporation - FIPS 140 4739 - active
Oracle Linux 7 NSS Cryptographic Module - Oracle Corporation - FIPS 140 4586 - historical
Oracle Linux 7 Libreswan Cryptographic Module - Oracle Corporation - FIPS 140 4266 - historical
Oracle Linux 8 libgcrypt Cryptographic Module - Oracle Corporation - FIPS 140 4232 - historical
Oracle Linux 8 GnuTLS Cryptographic Module - Oracle Corporation - FIPS 140 4229 - historical

See all 26 in the Security Certifications Explorer.

References

https://github.com/oracle/linux-uek/commit/49c68f5f892d8c2be00e0a89ff2a035422c03b59(Patch, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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